<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.css" rel="stylesheet">
    <link rel="stylesheet" href="./css/test_login.css">
</head>

<body>
    <div class="container">
        <div class="title center-block"></div>
        <form action="" class="form-inline center-block login_form">
            <div class="login_png"></div>
            <div class="text-center">
                <div class="form-group">
                    <label class="sr-only" for="username"></label>
                    <input type="text" class="form-control" id="username" placeholder="请输入用户名">
                </div>
                <div class="form-group">
                    <label class="sr-only" for="password"></label>
                    <input type="password" class="form-control" id="password" placeholder="密码">
                </div>
                <button type="submit" class="btn btn-success">登录</button>
            </div>
        </form>
    </div>
    <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
    <script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.js"></script>
    <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.js"></script>
</body>

</html>